package com.li.eduservice.listener;

import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.event.AnalysisEventListener;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.li.eduservice.entity.EduSubject;
import com.li.eduservice.entity.excel.SubjectData;
import com.li.eduservice.service.EduSubjectService;
import com.li.servicebase.exceptionhandler.XhuihuiException;


public class SubjectExcelListener extends AnalysisEventListener<SubjectData> {

    //因为SubjectExcelListener不能交给spring进行管理，需要自己new，不能注入其他对象
    //不能实现数据库操作
    public EduSubjectService subjectService;

    public SubjectExcelListener() {
    }

    public SubjectExcelListener(EduSubjectService subjectService) {
        this.subjectService = subjectService;
    }

    @Override
    public void invoke(SubjectData subjectData, AnalysisContext analysisContext) {

        if (subjectData == null){
            throw new XhuihuiException(20001,"文件数据为空");
        }


        //一行一行的读取，每次读取有两个值，第一个值一级分类，第二个值二级分类
        //判断一级分类是否重复
        EduSubject oneSubject = this.oneSubject(subjectService, subjectData.getOneSubjectName());
        if (oneSubject == null){//没有相同一级分类，进行添加
            oneSubject = new EduSubject();
            oneSubject.setParentId("0");
            oneSubject.setTitle(subjectData.getOneSubjectName());//一级分类名称
            subjectService.save(oneSubject);
        }
        //获取一级分类id值
        String pid = oneSubject.getId();

        //添加二级分类
        //判断二级分类是否重复
        EduSubject twoSubject = this.twoSubject(subjectService, subjectData.getTwoSubjectName(), pid);
        if (twoSubject == null){
            twoSubject = new EduSubject();
            twoSubject.setParentId(pid);
            twoSubject.setTitle(subjectData.getTwoSubjectName());//二级分类名称
            subjectService.save(twoSubject);
        }
    }

    //判断一级分类不能重复添加
    private EduSubject oneSubject(EduSubjectService subjectService,String name){
        QueryWrapper<EduSubject> wrapper = new QueryWrapper<>();
        wrapper.eq("title",name);
        wrapper.eq("parent_id","0");
        EduSubject one = subjectService.getOne(wrapper);
        return one;
    }
    //判断二级分类不能重复添加
    private EduSubject twoSubject(EduSubjectService subjectService,String name,String pid){
        QueryWrapper<EduSubject> wrapper = new QueryWrapper<>();
        wrapper.eq("title",name);
        wrapper.eq("parent_id",pid);
        EduSubject two = subjectService.getOne(wrapper);
        return two;
    }
    @Override
    public void doAfterAllAnalysed(AnalysisContext analysisContext) {

    }
}
